linux-kernel - Re: [git pull] PCI changes for 2.6.30

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Message-ID: <20090401183749.GC8188@ldl.fc.hp.com>
Date:	Wed, 1 Apr 2009 12:37:49 -0600
From:	Alex Chiang <achiang@...com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [git pull] PCI changes for 2.6.30

* Jesse Barnes <jbarnes@...tuousgeek.org>:
> On Wed, 1 Apr 2009 10:01:12 -0700 (PDT)
> Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> 
> > 
> > 
> > On Tue, 31 Mar 2009, Jesse Barnes wrote:
> > >
> > > Please consider pulling my PCI tree from
> > >   git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
> > > linux-next
> > 
> > This produces
> > 
> >   WARNING: drivers/built-in.o(.text+0x69a1): Section mismatch in
> > reference from the function dev_rescan_store() to the
> > function .devinit.text:pci_rescan_bus() The function
> > dev_rescan_store() references the function __devinit
> > pci_rescan_bus(). This is often because dev_rescan_store lacks a
> > __devinit annotation or the annotation of pci_rescan_bus is wrong.
> > 
> > Hmm?
> 
> Arg how did I miss that?  Maybe the last build I did was missing
> hotplug support or something... Anyway looking now (at first glance I
> think pci_rescan_bus needs to drop __devinit).

This was my fault. pci_rescan_bus() definitely does not want
__devinit.

But I'm confused -- didn't we used to have an option in
menuconfig under Kernel Hacking that would turn on section
mismatch warnings? I used to have that turned on, and don't
remember turning it off, and I can't find it now.

I'm told that we're supposed to set it on the make command line,
like:

	make CONFIG_DEBUG_SECTION_MISMATCH=y -j16

or something. Has this changed recently or am I just imagining
things (or just plain stupid?)

Thanks.

/ac

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